Battle over accounts...net
It seems Blizzard is having issues again; this time it might be more serious than just server load or random account hacking. Battle.net has been hacked and lost some valuable info. Fortunately, it seems that all credit card and personal information is still safe. However, passwords might have been compromised.
"At this time, we’ve found no evidence that financial information such as credit cards, billing addresses, or real names were compromised. Our investigation is ongoing, but so far nothing suggests that these pieces of information have been accessed.
Some data was illegally accessed, including a list of email addresses for global Battle.net users, outside of China. For players on North American servers (which generally includes players from North America, Latin America, Australia, New Zealand, and Southeast Asia) the answer to the personal security question, and information relating to Mobile and Dial-In Authenticators were also accessed. Based on what we currently know, this information alone is NOT enough for anyone to gain access to Battle.net accounts."
Though passwords have been taken there is hope at the end of the dungeon. The passwords are heavily encrypted and have to be decrypted individually. Nevertheless, Blizzard advises those on the affected servers (currently only the North American servers) to change their password as a precautionary measure. If you use any similar passwords elsewhere, it is never a bad idea to change those as well. Being paranoid never hurts, especially if it involves hackers.
Read the full statement/apology from Blizzard themselves here.